Bolthole Index

Hardin County, Texas

Building permits, zoning and septic rules in Hardin County, Texas

68Index Score / 100
#49 of 254 in Texas

Unincorporated Hardin County, Texas has no zoning ordinance, but Hardin County's Floodplain Administration requires a Development Residential Permit before you build, add on, or place a structure on the land12. A separate permit covers placing a manufactured home, and roadside culverts have their own permit and installation fee3. Septic (OSSF) systems are permitted under the county's Subdivision Regulations, which name the Hardin County Environmental Health Department as the permitting authority alongside the state45.

At a glance

Building / development permit
Development Residential Permit required for construction, additions, and other development; fee $100 for the first 1,000 sq ft plus $25 per additional 100 sq ft23
Zoning
None; the county's permit program covers development, floodplain, manufactured homes and subdivisions, not zoning districts1
Manufactured home placement
Separate permit required before the home is placed, $100 per home3
Septic permits
OSSF systems are permitted by the Hardin County Environmental Health Department under the county's Subdivision Regulations45
RV / tiny home / manufactured home living
Not restricted by zoning, but a manufactured home still needs its own placement permit63
Culvert permit
All roadside culverts must be installed by the county; $50 permit fee, plus $400 installation charge for each culvert after the first3
Owner-builder exemption
Not stated on the county's site; unconfirmed7
Driveway onto a state highway
Needs a TxDOT permit (Form 1058), not a county permit8

Who to call

Building permits

Hardin County Floodplain Administration

Development Residential Permits, manufactured home placement permits, electrical permits, and culvert permits for unincorporated Hardin County; also administers the county's floodplain ordinance.

(409) 246-5250

[email protected]

225 Crocker Street, Kountze, TX 77625

Septic permits

Hardin County Environmental Health Department

OSSF (septic) permitting for property in Hardin County subdivisions, alongside TCEQ; the county's website does not list a direct phone or address for this department, so start with the general county courthouse line.

Contact details are copied from each office’s official page and were checked against it on September 24, 2026.

Do you need a building permit in Hardin County, Texas?

Unincorporated Hardin County, Texas requires a Development Residential Permit before most construction begins, issued by the county's Floodplain Administration23. The county defines development broadly: any man-made change to real estate, including buildings and other structures, mining, dredging, filling, grading, paving, excavation, drilling, or storage of equipment or materials3. The permit fee is $100 for the first 1,000 square feet plus $25 for each additional 100 square feet, though fees can be waived on some non-residential outbuildings depending on use3. Placing a manufactured home on the property needs its own separate permit, at $100 per home, and it's the buyer or homeowner's responsibility to obtain it, not the dealer or transporter3.

Who is the Hardin County building department, and how do you reach them?

Hardin County's development, floodplain, manufactured home, electrical, and culvert permits are all issued through the Floodplain Administration at 225 Crocker Street, Kountze, TX 77625, phone (409) 246-5250, email [email protected]3. Before running electrical service from Entergy or SHECO to new construction, you need a separate $30 electrical permit from the same office3. If you'll need a driveway culvert on a county road, the county installs the first one at no charge beyond a $50 permit fee, and charges $450 for each additional culvert on the same property3. The county doesn't install culverts on state highways or private roads, so a state-highway driveway routes through TxDOT instead38.

Does Hardin County have zoning?

Hardin County has no zoning ordinance; its permit program covers development, floodplain, manufactured homes, electrical service, and culverts, not zoning districts1. Texas gives most counties no general zoning power at all, and Hardin County is not one of the narrow exceptions the legislature has carved out for specific areas6. Because there's no zoning, the county sets no minimum home size, minimum lot size, setback, lot-coverage limit, or building-height limit by ordinance, and doesn't restrict RVs, tiny homes, manufactured homes, or accessory dwellings through zoning6. That doesn't mean there's no process: the Development Residential Permit and manufactured-home placement permit above still apply to most new structures23.

How do septic permits work in Hardin County?

Hardin County's Subdivision Regulations name the Hardin County Environmental Health Department as the local authority for OSSF (on-site sewage facility, commonly called septic) permits, alongside TCEQ45. Subdivisions that use OSSFs must meet the requirements of 30 Texas Administrative Code 285.4(c) and all other applicable law5. The county's website does not list a direct phone number or address for the Environmental Health Department, so call the county courthouse switchboard to be routed5. Statewide, Texas requires a permit and approved plan to construct, alter, repair, or extend an OSSF, though a 10-acre exemption can apply if a licensed site evaluator or engineer signs off, the tract has a single-family home on at least 10 acres, all system parts sit at least 100 feet from the property line, and effluent stays on the property9.

Can you live in an RV or tiny home on your land in Hardin County?

Because unincorporated Hardin County has no zoning, there's no zoning-based restriction on living in an RV, a tiny home, or a manufactured home on your own land6. That said, if you place a manufactured home on the property, Hardin County's Floodplain Administration requires its own placement permit, at $100 per home, and the buyer or homeowner is responsible for getting it, not the dealer3. Any other structure or development on the land, including a tiny home built or moved in, likely triggers the county's Development Residential Permit and its per-square-foot fee23. Confirm with the Floodplain Administration how they'll treat your specific setup before you buy or move one in3.

Building a home in Hardin County: the steps, in order

  1. Contact the Hardin County Floodplain Administration (409-246-5250) before you buy, to confirm the flood zone and what the Development Residential Permit will require3.
  2. Submit the Development Residential Permit application; budget $100 for the first 1,000 square feet plus $25 per additional 100 square feet3.
  3. If you're placing a manufactured home, apply for the separate $100 manufactured home placement permit before the home arrives3.
  4. Apply for the $30 electrical permit before Entergy or SHECO will connect service3.
  5. If you need a roadside culvert for your driveway, apply for the county's culvert permit; the first culvert installs free beyond the $50 permit fee3.
  6. Contact the Hardin County Environmental Health Department for an OSSF (septic) permit if the property isn't on sewer5.
  7. If your driveway will connect to a state highway rather than a county road, apply to TxDOT for a driveway permit on Form 1058 instead of a county culvert permit8.

What to check before you buy land in Hardin County

Confirm the flood zone with the Floodplain Administration before you buy, since permit requests inside a Special Flood Hazard Area must comply with the Hardin County Floodplain Ordinance3. Hardin County's soils are a real constraint for septic: none of the county's soils are rated free of severe limits for a conventional drain field, so budget for an engineered or alternative OSSF system and confirm site evaluation requirements with the Environmental Health Department early105. The county is heavily wooded, at 85.7% forest cover, and gets 60.3 inches of rain a year, both of which affect site clearing and drainage planning1112. If your access road will need a culvert on a county road, budget the $450 charge for anything beyond the first one, or the separate TxDOT process if you're on a state highway38. There's no county zoning to check on a specific parcel, so verify any subdivision plat restrictions directly, since Hardin County's own Subdivision Regulations can set stricter OSSF lot-size rules than the state minimum6.

Watch-outs

  • Two official Hardin County pages give different street numbers for the Floodplain Administration's physical address on Crocker Street; call the office first to confirm the exact address before visiting in person3.
  • The county's website does not publish a direct phone number or address for the Environmental Health Department that issues septic permits; call the county courthouse switchboard to be routed5.

Sources

  1. Hardin County - Permits (2026 county census)
  2. Hardin County - Permits (Floodplain Administration) (2026 county census)
  3. Hardin County Floodplain Administration (hardincountytx.gov)
  4. Hardin County Subdivision Manual (2026 county census)
  5. Hardin County Environmental Health Department (hardincountytx.gov)
  6. Texas law on county zoning and building authority
  7. (2026 county census)
  8. Section 4: Driveway Permits, Design, and Materials (Texas statewide rule), quoted and re-checked
  9. Getting a Permit for an OSSF - Such as a Septic System (Texas statewide rule), quoted and re-checked
  10. Share of soils without severe limits for a conventional septic drain field (USDA SSURGO): Bolthole Index county data
  11. Wooded share of land: Bolthole Index county data
  12. Annual precipitation: Bolthole Index county data

Written September 24, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.

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County locator

Hardin County in Texas

68
County map
Hardin County highlighted among the Texas counties · colored by Index score

How Hardin County scores

Seclusion37100% ev.
Self-Sufficiency64100% ev.
Admin Boringness7190% ev.
Durability58100% ev.
Property Autonomy71100% ev.
Carry Cost72100% ev.

Evidence strength: 98%. This reports direct-source completeness and fallback use; it is separate from the score and is not a confidence interval. How it works →

$236kTypical home
1.2%Property tax
$5,546Land / acre
60.3"Annual rain
11.7% of yrsSevere drought
12.5 / yr (+10.9)Mid-century 100°F days
16.7 daysMid-century dry spell
3.19" (+3.9%)Mid-century 1-day rain
1.4×Wildfire change factor
100%Forward climate coverage
$2,485Home insurance / yr
-0.7% / yrInsurance growth
0%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
52,868People within 30 min
6,976,957People within 2 hr
34,398Radius comparison (15 mi)
65.4People / sq mi
9.9%Federal land
100%Land at 15% slope or less
0%Septic soil without severe limits
0 acWorkable land screen
85.7%Wooded land
36.5 tonsBiomass / forest ac
68°FAvg temp

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Answers from the rulebook for Hardin County

What the ordinances and state agencies actually say — one answer per question, each quoted from the official source and independently re-checked.

Hardin County rules

  • Zoning districts · by state lawNo county rule

    Unincorporated Hardin County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Hardin County has no zoning ordinance. The county legal census found no county zoning ordinance, citing hardincountytx.gov.

    • Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
    • Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
    • For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
    “This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
  • Minimum dwelling size · by state lawNo county rule

    Unincorporated Hardin County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Hardin County has no zoning ordinance. The county legal census found no county zoning ordinance, citing hardincountytx.gov.

    • Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
    • Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
    • For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
    “This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
  • Minimum lot size · by state lawNo county rule

    Unincorporated Hardin County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Hardin County has no zoning ordinance. The county legal census found no county zoning ordinance, citing hardincountytx.gov.

    • Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
    • Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
    • For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
    “This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
  • Setbacks · by state lawNo county rule

    Unincorporated Hardin County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Hardin County has no zoning ordinance. The county legal census found no county zoning ordinance, citing hardincountytx.gov.

    • Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
    • Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
    • For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
    “This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
  • Lot coverage · by state lawNo county rule

    Unincorporated Hardin County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Hardin County has no zoning ordinance. The county legal census found no county zoning ordinance, citing hardincountytx.gov.

    • Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
    • Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
    • For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
    “This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
  • Building height · by state lawNo county rule

    Unincorporated Hardin County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Hardin County has no zoning ordinance. The county legal census found no county zoning ordinance, citing hardincountytx.gov.

    • Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
    • Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
    • For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
    “This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
  • Living in an RV · by state lawNo county rule

    Unincorporated Hardin County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Hardin County has no zoning ordinance. The county legal census found no county zoning ordinance, citing hardincountytx.gov.

    • Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
    • Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
    • For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
    “This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
  • Camping on your land · by state lawNo county rule

    Unincorporated Hardin County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Hardin County has no zoning ordinance. The county legal census found no county zoning ordinance, citing hardincountytx.gov.

    • Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
    • Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
    • For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
    “This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
  • Tiny homes · by state lawNo county rule

    Unincorporated Hardin County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Hardin County has no zoning ordinance. The county legal census found no county zoning ordinance, citing hardincountytx.gov.

    • Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
    • Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
    • For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
    “This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
  • Manufactured homes · by state lawNo county rule

    Unincorporated Hardin County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Hardin County has no zoning ordinance. The county legal census found no county zoning ordinance, citing hardincountytx.gov.

    • Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
    • Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
    • For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
    “This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
  • Accessory dwellings · by state lawNo county rule

    Unincorporated Hardin County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Hardin County has no zoning ordinance. The county legal census found no county zoning ordinance, citing hardincountytx.gov.

    • Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits.
    • Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
    • For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
    “This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
  • Who permits septicMixed (with conditions)

    On-site sewage facilities and sewage systems in unincorporated Hardin County.

    • The county subdivision manual identifies the Hardin County Environmental Health Department or TCEQ as the permitting authority for OSSFs.
    • The applicable authority depends on the system and jurisdiction.
    “SEWAGE SYSTEM: A system for collection, treatment and disposal of sewage, whether said system is a wastewater treatment plant permitted by the TCEQ (Texas Commission on Environmental Quality) or an OSSF (on-site sewage facilities) permitted by the Hardin County Environmental Health Department or the TCEQ.”
  • Septic permitRequired

    Construction, installation, alteration, extension, repair, or operation of an on-site sewage facility, including septic systems and holding tanks, at locations in Hardin County within the TCEQ Region 10 permitting jurisdiction.

    • A permit and approved plan are required before constructing, installing, altering, extending, or repairing an OSSF.
    • Applications and planning materials must be submitted to the permitting authority; the TCEQ regional office is the permitting authority where a local jurisdiction has not been authorized.
    • Local permitting programs may be more stringent than state minimums.
    • An OSSF may be exempt under the 10-acre rule only if it complies with all other 30 TAC Chapter 285 requirements, receives a site evaluation by a TCEQ-licensed Site Evaluator or Professional Engineer, serves a single-family dwelling on a tract of at least 10 acres, causes no nuisance or groundwater pollution, has all parts at least 100 feet from the property line, disposes of effluent on the property, and serves no other dwelling on the tract.
    • Emergency repairs listed on the TCEQ page do not require a permit but must be reported to the permitting authority in writing within 72 hours after repairs begin.
    • Grandfathered systems may be exempt if installed before the applicable authorized-program date or before September 1, 1989, whichever is earlier, are not a nuisance, are not in need of repair, and have not been significantly increased in use or otherwise altered.
    • The permitting authority must approve or deny the application within 30 days of receipt and provide written reasons for a denial.
    • For subdivisions utilizing OSSFs in unincorporated Hardin County, the County Subdivision Manual requires an approved OSSF Subdivision Plan under 30 TAC 285.4(c).

    permit review deadline: 30 days (from receipt of the application) · 10-acre exemption tract size: >= 10 acres (all listed 10-acre-rule conditions must also be met) · 10-acre exemption setback: >= 100 feet from property line (all parts of the OSSF must meet this distance) · emergency-repair report deadline: 72 hours (after repairs have begun)

    “Permits are required for on-site sewage facilities (OSSFs) including septic systems and holding tanks. A permit and approved plan are required to construct, alter, repair, extend, and operate an OSSF.”
    One more reviewed finding on this topic
    • Limited — Subdivision development using onsite sewage facilities in unincorporated Hardin County.
      “An approved OSSF Subdivision Plan in accordance with 30 Texas Administrative Code 285.4(c) for subdivisions utilizing OSSFs;”
  • Mandatory utility hookupConditional

    Subdivision final-plat approval and access to utilities in unincorporated Hardin County.

    • Final plat materials must include approval from public utilities providing service or TCEQ acceptance of a special district that will provide public utilities.
    • No lots or conveyance within an unrecorded plat may be made until improvements necessary to ensure access, utilities, and drainage have been completed so the lots have full public services available directly to the property.
    “Approval from Public Utilities providing service to the subdivision or TCEQ acceptance of the creation of a Special District that will provide those public utilities;”
  • Driveway accessRequired

    Driveway access onto public roadways from lots within Hardin County subdivisions.

    • A culvert installation permit must be issued.
    • The Hardin County Road and Bridge Department must approve culvert size and grade.
    • The driveway must satisfy the minimum spacing requirement in the subdivision regulations or the county's then-current spacing requirements.
    • Driveway culverts must have a minimum interior diameter of 18 inches and a minimum length of 20 feet under the drainage requirements.

    minimum driveway spacing on roads without curb and gutter: >= 10 feet measured from culvert to culvert · minimum driveway culvert interior diameter: >= 18 inches · minimum driveway culvert length: >= 20 feet

    “No driveway constructed on any Lot within any subdivision shall be permitted access onto a public roadway unless: • A Permit for a Culvert installation is issued • The County Road & Bridge Department has approved the culvert size and grade; and • The driveway satisfies the minimum spacing requirement in these Subdivision Regulations or the County’s then current spacing requirements for such driveways.”
  • Permit processPublished (with conditions)

    Hardin County permit applications administered by Floodplain Administration.

    • The official page identifies the Floodplain Administration as the issuing office and provides the office address, phone number, and email contacts.
    • Different permit types have different applications and requirements.
    • Permit requests inside a Special Flood Hazard Area must comply with the Hardin County Floodplain Ordinance.
    • For state-highway culverts, applicants must contact TxDOT.
    “Permits Issued by: Floodplain Administration”
  • Building permitLimited

    Texas counties cannot adopt a general building code for unincorporated areas, but Hardin County's Floodplain Administration issues a 'Development Residential Permit' (fee $100 for first 1,000 sq ft plus $25 per additional 100 sq ft) and floodplain/development permits countywide.

    Hardin County - Permits (Floodplain Administration) ↗Scouted from the county site, not yet independently re-checked

  • County-wide zoningAbsent

    As a Texas county, Hardin County has no zoning authority in unincorporated areas; its permit program lists only development, floodplain, subdivision and infrastructure permits, with no zoning ordinance.

    Hardin County - Permits ↗Scouted from the county site, not yet independently re-checked

Texas rules that apply here

  • Building code adoptedPartial

    Industrialized housing and buildings, modules, and modular components governed by the Texas Industrialized Housing and Buildings program.

    • The mandatory state code adoption applies to industrialized housing and buildings, modules, and modular components, not all construction statewide.
    • The effective date is July 1, 2024.
    • The International Existing Building Code applies to alterations of portable industrialized buildings.
    • Manufacturers already certified for Texas must have design-package documents reviewed and approved to the new editions with an approval date on or after July 1, 2024, unless the manufacturer elected to transition before the effective date under Department rule 70.70(a)(5)(B).
    • Construction begun on or after July 1, 2024 must comply with the new code editions and approved design packages.
    • Construction begun before July 1, 2024, or before a manufacturer's effective transition date, must meet the stated completion, inspection, and labeling deadline to remain eligible for a Texas decal.

    effective date: 2024-07-01 · International Building Code: 2021 Edition (including appendices C, F, and K) · International Residential Code: 2021 Edition (including appendices AG, AH, AK, AP, AQ, and AT) · International Fuel Gas Code: 2021 Edition · International Mechanical Code: 2021 Edition · International Plumbing Code: 2021 Edition · International Energy Conservation Code: 2015 Edition · National Electrical Code: 2020 Edition · International Existing Building Code: 2021 Edition (for alterations of portable industrialized buildings)

    “July 1, 2024, all industrialized housing and buildings, modules, and modular components shall comply with the following codes, as amended in §70.101 of the IHB Rules:”
  • Septic inspectionLimited

    OSSF installation and, where applicable, maintenance inspections in Texas

    • Authorized agents or their designated representatives inspect system installation.
    • Some permitting authorities impose more stringent requirements.
    • Maintenance-provider inspection and reporting requirements apply to systems and circumstances governed by 30 TAC §285.91(4).
    • Electronic monitoring may reduce reporting to every six months where the stated monitoring conditions apply.

    reduced maintenance reporting interval with qualifying electronic monitoring: 6 months (only where the system uses the specified electronic monitoring, automatic notification, and disinfection monitoring)

    “Many times, the AA has a "designated representative" (DR) to assist them with their responsibilities, which include reviewing plans for constructing, altering, extending or repairing each OSSF; issuing permits; and inspecting system installation. [...] If the system uses an electronic monitor, automatic radio or telephone to notify the maintenance provider of system or component failure and to monitor the amount of disinfection in the system, reporting may be reduced to every six months.”
  • county zoning authorityLimited

    Texas counties adopting zoning regulations for specified unincorporated or otherwise specially defined areas.

    • Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters.
    • For Padre Island, the authority applies in Cameron or Willacy County outside a municipality and within two miles of a publicly owned park or recreational development, or within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.
    • Other Chapter 231 subchapters address special areas including the Amistad Recreation Area in Val Verde County, military zones, certain lakes, the El Paso Mission Trail Historical Area, Lake Somerville, and Falcon Lake in Zapata County.
    • The cited statute was enacted effective September 1, 1987; the Falcon Lake subchapter was added effective June 15, 2007, and amended effective September 1, 2009.

    Padre Island distance from publicly owned park or recreational development: <= 2 miles (Area must be outside a municipality and in Cameron or Willacy County.) · Padre Island distance from beach, wharf, or bathhouse: <= 2 miles (The beach, wharf, or bathhouse must be used by at least 500 persons annually.)

    “This subchapter applies to the areas of Padre Island located in Cameron or Willacy County and located: (1) outside a municipality but within two miles of a publicly owned park or recreational development; or (2) within two miles of a beach, wharf, or bathhouse used by at least 500 persons annually.”
  • county building authorityLimited

    Texas counties adopting and enforcing fire-code building permits for specified buildings in unincorporated areas and applying residential building-code standards in certain counties.

    • Under Section 233.061, the county must have a population over 250,000 or be adjacent to a county with a population over 250,000.
    • Under Section 233.062, the fire code applies only to commercial establishments, public buildings, and multifamily residential dwellings consisting of four or more units constructed in an unincorporated area.
    • The fire code does not apply to an industrial facility having a fire brigade that conforms to Occupational Health and Safety Administration requirements.
    • A covered applicant must submit a plan and a commissioners-court-set application fee; the county must issue or deny the permit within 30 days, and failure to act within 30 days approves the construction for purposes of the subchapter.
    • The fire code must conform to the International Fire Code or Uniform Fire Code as those codes existed on May 1, 2005, or establish protective measures exceeding those standards; later editions may be adopted.
    • Residential standards under Section 233.152 apply only if the county adopts a resolution or order and the county is within 50 miles of an international border or has a population over 100.
    • Those residential standards apply only to new single-family-house or duplex construction beginning after September 1, 2009; manufactured or modular structures governed by Occupations Code Chapters 1201 or 1202 are excluded from the definition of new residential construction.
    • A municipality's building code controls in its extraterritorial jurisdiction, and Section 233.152 does not authorize county prior approval of new residential construction or county zoning regulations.
    • Fire-code inspection and permit fees may be charged under a fee schedule based on building type, limited to amounts necessary to administer and enforce the subchapter; inspection fees must be reasonable and reflect approximate inspection costs.

    county population threshold for fire-code authority: > 250000 persons (A county adjacent to a county over 250,000 also qualifies.) · multifamily residential dwelling threshold: >= 4 units (The fire code applies only to covered buildings constructed in an unincorporated area.) · residential-code border distance: <= 50 miles (Alternative qualification is county population over 100.) · application decision period: 30 days (If the commissioners court does not issue or deny the permit within 30 days after receiving the application and fee, construction is approved for purposes of the subchapter.) · residential standards effective construction date: > 2009-09-01 (Applies only to new residential construction that begins after September 1, 2009.)

    “The commissioners court of a county with a population of over 250,000 or a county adjacent to a county with a population of over 250,000 may adopt a fire code and rules necessary to administer and enforce the fire code. [...] The fire code applies only to the following buildings constructed in an unincorporated area of the county: (1) a commercial establishment; (2) a public building; and (3) a multifamily residential dwelling consisting of four or more units.”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission — ask the county directly.

  • Owner-builder exemption — Owner-builder exemptions from county construction or development requirements.
  • Inspections — Building inspections in Hardin County.
  • Certificate of occupancy — Certificates of occupancy in Hardin County.
  • Local zoning — Aggregate municipal and other local zoning within Hardin County.
  • Off-grid sanitation — Off-grid sanitation systems in Hardin County.
3 more unanswered
  • Well permit
  • Agricultural exemption
  • Short-term rentals

Each answer was extracted from an official source and independently re-checked against that source by a second reviewer. That is an evidence check, not legal advice. Rules change; confirm with the authority before you buy or build.

Living off-grid in Hardin County, Texas

Is Hardin County a good place to live off-grid or homestead?

Hardin County scores 68/100 on the Bolthole Index, a strong county profile. Its strengths: manageable long-term carry cost and low administrative friction for a quiet rural property. Watch-outs: about 52,868 people within a 30-minute drive.

Do you need a building permit in Hardin County, Texas?

Hardin County requires a building permit only in limited cases (such as floodplains or specific zones), and it has no county-wide zoning. Onsite septic is permitted by Hardin County Sanitarian. These answers are quoted from official sources and independently re-checked. Rules change and cities within the county differ — always confirm with the county before you buy or build.

Can you live in an RV or tiny home on your land in Hardin County?

Living in an RV on your own land in Hardin County is allowed: Unincorporated Hardin County: no county rule sets this, because Texas law gives zoning power only to certain counties, and Hardin County has no zoning ordinance. The county legal census found no county zoning ordinance, citing hardincountytx.gov. Septic, floodplain, subdivision and health rules still apply; cities and towns set their own rules inside their limits. Chapter 231 does not grant a general statewide county zoning power; authority is provided through geographically or subject-matter limited subchapters. A tiny home is allowed. Confirm with the county before relying on it.

How much does land cost in Hardin County, Texas?

Land in Hardin County runs about $5,546 per acre, based on the latest county data.

What is the water situation in Hardin County?

Hardin County gets about 60.3" of rain a year, with severe drought in roughly 11.7% of years.

How remote is Hardin County?

A representative private-land location has about 52,868 people within a 30-minute drive and 6,976,957 within two hours. The road-network catchments count population across county lines and clusters of smaller cities; straight-line radius values remain available as a comparison.

Off-grid gear

Going off-grid in Hardin County means bringing your own water and power. The kit we’d start with:

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How Hardin compares in Texas

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